Edrisabdella Nuure posted an update — Oct 14, 2025 04:47 PM EDT

One-Click Bitcoin Yield Shuttle

A Bitcoin-native dApp powered by Starknet

---

Inspiration

Bitcoin has always been the most secure and decentralized store of value — but using it productively in DeFi has been limited by complex bridges, fragmented liquidity, and high transaction friction.
We were inspired by the idea of bringing Bitcoin yield opportunities to everyone in a single click, abstracting away the blockchain complexity through Starknet’s high-performance ZK rollup.

Our vision:

“A simple, secure, non-custodial way to deposit Bitcoin and earn on-chain yield — without needing to know how DeFi works.”

---

What it does

One-Click Bitcoin Yield Shuttle lets users:

• Deposit BTC (via wrapped Bitcoin or Layer-2 representations)
  
• Automatically allocate funds into yield-earning protocols
  
• Withdraw anytime, with transparent Starknet-verified records
  
• Enjoy near-zero gas fees and full self-custody
  

In essence, it’s a DeFi yield gateway for Bitcoiners, powered by Starknet’s scalability and Atomiq’s account abstraction layer.

---

How we built it

We built the project using a hybrid stack that merges Bitcoin and Starknet ecosystems:

Frontend

• HTML5 + Vanilla JS + Starknet.js
• Wallet connection for Argent X / Xverse / Braavos
  
• REST API integration to backend yield management endpoints
  

Backend

• Node.js / Express API to manage deposits, withdrawals, and balance updates
  
• Atomiq SDK for Starknet integration
  
• Starknet smart contract for secure custody and yield distribution
  

Smart Contract Layer

• Written in Cairo 1.0
• Manages user positions, vault accounting, and on-chain proof of yield accrual
  

Deployment

• Hosted frontend on Vercel
• Backend API hosted on Render / Railway
• Testnet contracts deployed on Starknet Sepolia

---

Challenges we ran into

1. Cross-chain abstraction: Managing Bitcoin inputs while maintaining Starknet compatibility was complex.
   
2. Bridging security: Ensuring wrapped BTC assets remain verifiable and trust-minimized.
   
3. Account abstraction: Designing a universal flow for users with no prior wallet setup.
   
4. UI/UX simplicity: Achieving “one click” without hiding essential transparency details.

---

Accomplishments that we're proud of

• Implemented a working demo where users can deposit & withdraw BTC test tokens on Starknet.
  
• Created an account-abstracted transaction flow using the Atomiq SDK.
  
• Designed a minimalist dashboard UI that’s intuitive and responsive.
  
• Built a secure backend layer linking BTC actions with Starknet vault logic.
  

---

What we learned

• Deepened understanding of Starknet’s Cairo smart contracts and ZK proofs.
  
• Learned to integrate Bitcoin bridges and wrapped assets within a Starknet environment.
  
• Understood the design trade-offs between UX simplicity and DeFi transparency.
  
• Enhanced teamwork and rapid prototyping for hackathon delivery.

---

What’s next for the Starknet Hackathon project

• Mainnet launch on Starknet with audited contracts
  
• Integration with real BTC bridges (e.g. Babylon, Wrapped Bitcoin)
  
• Dynamic yield strategies powered by AI allocation
  
• Mobile-first UI and wallet onboarding for non-crypto users
  

- Partnerships with Starknet DeFi protocols to expand earning options

Built With

• Starknet.js
  
• Cairo 1.0
  
• Node.js / Express.js
  
• Atomiq SDK
  
• HTML5 + CSS + JavaScript
  
• Vercel / Railway / GitHub
  

Problem Statement

Despite Bitcoin’s dominance as the world’s most trusted digital asset, Bitcoin holders have very limited access to decentralized finance (DeFi). Most existing yield or lending options require:

Bridging BTC to other blockchains (often risky and complex)

Managing multiple wallets, gas fees, and protocols

Trusting centralized custodians or wrapped-asset issuers

This creates friction, fragmentation, and security risks for everyday Bitcoin users who simply want to earn yield safely.

Our Solution

One-Click Bitcoin Yield Shuttle solves this by creating a seamless bridge between Bitcoin and Starknet’s DeFi ecosystem. Through account abstraction, Starknet rollups, and Atomiq’s infrastructure, users can:

Deposit Bitcoin or wrapped Bitcoin assets with a single click

Automatically participate in yield-earning pools on Starknet

Withdraw anytime — no technical knowledge required

The project abstracts away all the blockchain complexity while maintaining self-custody, transparency, and low fees.

Who Benefits

Everyday Bitcoin Holders: Gain easy access to DeFi yields without bridging risk or wallet confusion.

DeFi Enthusiasts & Developers: Get a modular infrastructure layer to build yield products that integrate Bitcoin liquidity.

The Starknet Ecosystem: Benefits from increased BTC liquidity inflow and broader user adoption.

Institutions & Custodial Services: Can offer Starknet-powered Bitcoin yield products with full on-chain transparency

Log in or sign up for Devpost to join the conversation.

Edrisabdella Nuure started this project — Oct 14, 2025 03:52 PM EDT

Leave feedback in the comments!

Log in or sign up for Devpost to join the conversation.